The first MACHO spectrum

Composite spectrum of the two very close objects seen on the HST image (ESO Press Photo eso0140). It is based on four 1500-second exposures that were obtained with the FORS2 multi-mode instrument at the 8.2-m VLT KUEYEN telescope on February 2, 2001. The presence of certain metal and alkali resonance lines, in particular of sodium (Na), is typical of a cool stellar object. Telluric molecular bands (from the Earth's atmosphere) are indicated with an earth-symbol.

Crédito:

ESO

Sobre la imagen

Identificador:eso0140b
Tipo:Observación
Fecha de publicación:5 de Diciembre de 2001
Noticias relacionadas:eso0140
Tamaño:1003 x 682 px

Sobre el objeto

Nombre:Hubble Space Telescope, MACHO, Spectrum, Very Large Telescope
Tipo:Early Universe : Cosmology : Phenomenon : Dark Matter
Milky Way : Cosmology : Phenomenon : Lensing
Categoría:Cosmology
Illustrations

Formatos de imagen

Tamaño original
114,7 KB
JPEG grande
82,2 KB

Colores y filtros

BandaLongitud de ondaTelescopio
Infrarrojo
I
800 nmVery Large Telescope
FORS2